分式运算:((x^2-4y^2)/3xy^2)×(xy/(x+2y))

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分式运算:((x^2-4y^2)/3xy^2)×(xy/(x+2y))

((x^2-4y^2)/3xy^2)×[xy/(x+2y)]
=[(x+2y)(x-2y)]/3xy^2]×[xy/(x+2y)]
=(x-2y)/3y